3 * Support for CX23885 analog audio capture
5 * (c) 2008 Mijhail Moreyra <mijhail.moreyra@gmail.com>
6 * Adapted from cx88-alsa.c
7 * (c) 2009 Steven Toth <stoth@kernellabs.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/device.h>
23 #include <linux/interrupt.h>
24 #include <linux/vmalloc.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/pci.h>
28 #include <asm/delay.h>
30 #include <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/control.h>
34 #include <sound/initval.h>
36 #include <sound/tlv.h>
40 #include "cx23885-reg.h"
42 #define AUDIO_SRAM_CHANNEL SRAM_CH07
44 #define dprintk(level, fmt, arg...) do { \
45 if (audio_debug + 1 > level) \
46 printk(KERN_INFO "%s: " fmt, chip->dev->name , ## arg); \
49 #define dprintk_core(level, fmt, arg...) if (audio_debug >= level) \
50 printk(KERN_DEBUG "%s: " fmt, chip->dev->name , ## arg)
52 /****************************************************************************
53 Module global static vars
54 ****************************************************************************/
56 static unsigned int disable_analog_audio;
57 module_param(disable_analog_audio, int, 0644);
58 MODULE_PARM_DESC(disable_analog_audio, "disable analog audio ALSA driver");
60 static unsigned int audio_debug;
61 module_param(audio_debug, int, 0644);
62 MODULE_PARM_DESC(audio_debug, "enable debug messages [analog audio]");
64 /****************************************************************************
65 Board specific funtions
66 ****************************************************************************/
68 /* Constants taken from cx88-reg.h */
69 #define AUD_INT_DN_RISCI1 (1 << 0)
70 #define AUD_INT_UP_RISCI1 (1 << 1)
71 #define AUD_INT_RDS_DN_RISCI1 (1 << 2)
72 #define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */
73 #define AUD_INT_UP_RISCI2 (1 << 5)
74 #define AUD_INT_RDS_DN_RISCI2 (1 << 6)
75 #define AUD_INT_DN_SYNC (1 << 12)
76 #define AUD_INT_UP_SYNC (1 << 13)
77 #define AUD_INT_RDS_DN_SYNC (1 << 14)
78 #define AUD_INT_OPC_ERR (1 << 16)
79 #define AUD_INT_BER_IRQ (1 << 20)
80 #define AUD_INT_MCHG_IRQ (1 << 21)
81 #define GP_COUNT_CONTROL_RESET 0x3
83 static int cx23885_alsa_dma_init(struct cx23885_audio_dev *chip, int nr_pages)
85 struct cx23885_audio_buffer *buf = chip->buf;
89 buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
90 if (NULL == buf->vaddr) {
91 dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages);
95 dprintk(1, "vmalloc is at addr 0x%08lx, size=%d\n",
96 (unsigned long)buf->vaddr,
97 nr_pages << PAGE_SHIFT);
99 memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT);
100 buf->nr_pages = nr_pages;
102 buf->sglist = vzalloc(buf->nr_pages * sizeof(*buf->sglist));
103 if (NULL == buf->sglist)
106 sg_init_table(buf->sglist, buf->nr_pages);
107 for (i = 0; i < buf->nr_pages; i++) {
108 pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE);
110 goto vmalloc_to_page_err;
111 sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0);
124 static int cx23885_alsa_dma_map(struct cx23885_audio_dev *dev)
126 struct cx23885_audio_buffer *buf = dev->buf;
128 buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
129 buf->nr_pages, PCI_DMA_FROMDEVICE);
131 if (0 == buf->sglen) {
132 pr_warn("%s: cx23885_alsa_map_sg failed\n", __func__);
138 static int cx23885_alsa_dma_unmap(struct cx23885_audio_dev *dev)
140 struct cx23885_audio_buffer *buf = dev->buf;
145 dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE);
150 static int cx23885_alsa_dma_free(struct cx23885_audio_buffer *buf)
160 * BOARD Specific: Sets audio DMA
163 static int cx23885_start_audio_dma(struct cx23885_audio_dev *chip)
165 struct cx23885_audio_buffer *buf = chip->buf;
166 struct cx23885_dev *dev = chip->dev;
167 struct sram_channel *audio_ch =
168 &dev->sram_channels[AUDIO_SRAM_CHANNEL];
170 dprintk(1, "%s()\n", __func__);
172 /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
173 cx_clear(AUD_INT_DMA_CTL, 0x11);
175 /* setup fifo + format - out channel */
176 cx23885_sram_channel_setup(chip->dev, audio_ch, buf->bpl,
180 cx_write(AUD_INT_A_LNGTH, buf->bpl);
182 /* This is required to get good audio (1 seems to be ok) */
183 cx_write(AUD_INT_A_MODE, 1);
186 cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
187 atomic_set(&chip->count, 0);
189 dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
190 "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start+12)>>1,
191 chip->num_periods, buf->bpl * chip->num_periods);
193 /* Enables corresponding bits at AUD_INT_STAT */
194 cx_write(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
197 /* Clean any pending interrupt bits already set */
198 cx_write(AUDIO_INT_INT_STAT, ~0);
200 /* enable audio irqs */
201 cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
204 cx_set(DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
205 cx_set(AUD_INT_DMA_CTL, 0x11); /* audio downstream FIFO and
208 cx23885_sram_channel_dump(chip->dev, audio_ch);
214 * BOARD Specific: Resets audio DMA
216 static int cx23885_stop_audio_dma(struct cx23885_audio_dev *chip)
218 struct cx23885_dev *dev = chip->dev;
219 dprintk(1, "Stopping audio DMA\n");
222 cx_clear(AUD_INT_DMA_CTL, 0x11);
225 cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
226 cx_clear(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
230 cx23885_sram_channel_dump(chip->dev,
231 &dev->sram_channels[AUDIO_SRAM_CHANNEL]);
237 * BOARD Specific: Handles audio IRQ
239 int cx23885_audio_irq(struct cx23885_dev *dev, u32 status, u32 mask)
241 struct cx23885_audio_dev *chip = dev->audio_dev;
243 if (0 == (status & mask))
246 cx_write(AUDIO_INT_INT_STAT, status);
248 /* risc op code error */
249 if (status & AUD_INT_OPC_ERR) {
250 printk(KERN_WARNING "%s/1: Audio risc op code error\n",
252 cx_clear(AUD_INT_DMA_CTL, 0x11);
253 cx23885_sram_channel_dump(dev,
254 &dev->sram_channels[AUDIO_SRAM_CHANNEL]);
256 if (status & AUD_INT_DN_SYNC) {
257 dprintk(1, "Downstream sync error\n");
258 cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
261 /* risc1 downstream */
262 if (status & AUD_INT_DN_RISCI1) {
263 atomic_set(&chip->count, cx_read(AUD_INT_A_GPCNT));
264 snd_pcm_period_elapsed(chip->substream);
266 /* FIXME: Any other status should deserve a special handling? */
271 static int dsp_buffer_free(struct cx23885_audio_dev *chip)
273 struct cx23885_riscmem *risc;
275 BUG_ON(!chip->dma_size);
277 dprintk(2, "Freeing buffer\n");
278 cx23885_alsa_dma_unmap(chip);
279 cx23885_alsa_dma_free(chip->buf);
280 risc = &chip->buf->risc;
281 pci_free_consistent(chip->pci, risc->size, risc->cpu, risc->dma);
290 /****************************************************************************
292 ****************************************************************************/
295 * Digital hardware definition
297 #define DEFAULT_FIFO_SIZE 4096
299 static struct snd_pcm_hardware snd_cx23885_digital_hw = {
300 .info = SNDRV_PCM_INFO_MMAP |
301 SNDRV_PCM_INFO_INTERLEAVED |
302 SNDRV_PCM_INFO_BLOCK_TRANSFER |
303 SNDRV_PCM_INFO_MMAP_VALID,
304 .formats = SNDRV_PCM_FMTBIT_S16_LE,
306 .rates = SNDRV_PCM_RATE_48000,
311 /* Analog audio output will be full of clicks and pops if there
312 are not exactly four lines in the SRAM FIFO buffer. */
313 .period_bytes_min = DEFAULT_FIFO_SIZE/4,
314 .period_bytes_max = DEFAULT_FIFO_SIZE/4,
317 .buffer_bytes_max = (1024*1024),
321 * audio pcm capture open callback
323 static int snd_cx23885_pcm_open(struct snd_pcm_substream *substream)
325 struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
326 struct snd_pcm_runtime *runtime = substream->runtime;
330 printk(KERN_ERR "BUG: cx23885 can't find device struct."
331 " Can't proceed with open\n");
335 err = snd_pcm_hw_constraint_pow2(runtime, 0,
336 SNDRV_PCM_HW_PARAM_PERIODS);
340 chip->substream = substream;
342 runtime->hw = snd_cx23885_digital_hw;
344 if (chip->dev->sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
346 unsigned int bpl = chip->dev->
347 sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 4;
348 bpl &= ~7; /* must be multiple of 8 */
349 runtime->hw.period_bytes_min = bpl;
350 runtime->hw.period_bytes_max = bpl;
355 dprintk(1, "Error opening PCM!\n");
360 * audio close callback
362 static int snd_cx23885_close(struct snd_pcm_substream *substream)
371 static int snd_cx23885_hw_params(struct snd_pcm_substream *substream,
372 struct snd_pcm_hw_params *hw_params)
374 struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
375 struct cx23885_audio_buffer *buf;
378 if (substream->runtime->dma_area) {
379 dsp_buffer_free(chip);
380 substream->runtime->dma_area = NULL;
383 chip->period_size = params_period_bytes(hw_params);
384 chip->num_periods = params_periods(hw_params);
385 chip->dma_size = chip->period_size * params_periods(hw_params);
387 BUG_ON(!chip->dma_size);
388 BUG_ON(chip->num_periods & (chip->num_periods-1));
390 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
394 buf->bpl = chip->period_size;
397 ret = cx23885_alsa_dma_init(chip,
398 (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
402 ret = cx23885_alsa_dma_map(chip);
406 ret = cx23885_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
407 chip->period_size, chip->num_periods, 1);
411 /* Loop back to start of program */
412 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
413 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
414 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
416 substream->runtime->dma_area = chip->buf->vaddr;
417 substream->runtime->dma_bytes = chip->dma_size;
418 substream->runtime->dma_addr = 0;
431 static int snd_cx23885_hw_free(struct snd_pcm_substream *substream)
434 struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
436 if (substream->runtime->dma_area) {
437 dsp_buffer_free(chip);
438 substream->runtime->dma_area = NULL;
447 static int snd_cx23885_prepare(struct snd_pcm_substream *substream)
455 static int snd_cx23885_card_trigger(struct snd_pcm_substream *substream,
458 struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
461 /* Local interrupts are already disabled by ALSA */
462 spin_lock(&chip->lock);
465 case SNDRV_PCM_TRIGGER_START:
466 err = cx23885_start_audio_dma(chip);
468 case SNDRV_PCM_TRIGGER_STOP:
469 err = cx23885_stop_audio_dma(chip);
476 spin_unlock(&chip->lock);
484 static snd_pcm_uframes_t snd_cx23885_pointer(
485 struct snd_pcm_substream *substream)
487 struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
488 struct snd_pcm_runtime *runtime = substream->runtime;
491 count = atomic_read(&chip->count);
493 return runtime->period_size * (count & (runtime->periods-1));
497 * page callback (needed for mmap)
499 static struct page *snd_cx23885_page(struct snd_pcm_substream *substream,
500 unsigned long offset)
502 void *pageptr = substream->runtime->dma_area + offset;
503 return vmalloc_to_page(pageptr);
509 static const struct snd_pcm_ops snd_cx23885_pcm_ops = {
510 .open = snd_cx23885_pcm_open,
511 .close = snd_cx23885_close,
512 .ioctl = snd_pcm_lib_ioctl,
513 .hw_params = snd_cx23885_hw_params,
514 .hw_free = snd_cx23885_hw_free,
515 .prepare = snd_cx23885_prepare,
516 .trigger = snd_cx23885_card_trigger,
517 .pointer = snd_cx23885_pointer,
518 .page = snd_cx23885_page,
522 * create a PCM device
524 static int snd_cx23885_pcm(struct cx23885_audio_dev *chip, int device,
530 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
533 pcm->private_data = chip;
534 strcpy(pcm->name, name);
535 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx23885_pcm_ops);
540 /****************************************************************************
541 Basic Flow for Sound Devices
542 ****************************************************************************/
545 * Alsa Constructor - Component probe
548 struct cx23885_audio_dev *cx23885_audio_register(struct cx23885_dev *dev)
550 struct snd_card *card;
551 struct cx23885_audio_dev *chip;
554 if (disable_analog_audio)
557 if (dev->sram_channels[AUDIO_SRAM_CHANNEL].cmds_start == 0) {
558 printk(KERN_WARNING "%s(): Missing SRAM channel configuration "
559 "for analog TV Audio\n", __func__);
563 err = snd_card_new(&dev->pci->dev,
564 SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
565 THIS_MODULE, sizeof(struct cx23885_audio_dev), &card);
569 chip = (struct cx23885_audio_dev *) card->private_data;
571 chip->pci = dev->pci;
573 spin_lock_init(&chip->lock);
575 err = snd_cx23885_pcm(chip, 0, "CX23885 Digital");
579 strcpy(card->driver, "CX23885");
580 sprintf(card->shortname, "Conexant CX23885");
581 sprintf(card->longname, "%s at %s", card->shortname, dev->name);
583 err = snd_card_register(card);
587 dprintk(0, "registered ALSA audio device\n");
593 printk(KERN_ERR "%s(): Failed to register analog "
594 "audio adapter\n", __func__);
602 void cx23885_audio_unregister(struct cx23885_dev *dev)
604 struct cx23885_audio_dev *chip = dev->audio_dev;
606 snd_card_free(chip->card);